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<!DOCTYPE html
>
<
html
lang
="
en
"
>
<
head
>
<
meta
charset
="
utf-8
"
>
<
meta
http-equiv
="
X-UA-Compatible
"
content
="
IE=edge
"
>
<
meta
name
="
viewport
"
content
="
width=device-width, initial-scale=1
"
>
<
title
>
SmallBASIC | NIL
</
title
>
<
meta
name
="
description
"
content
="
NIL is used to mean 'not set' as distinct from having an INT set to 0
"
>
<
link
rel
="
canonical
"
href
="
1735
"
>
<
link
rel
="
keywords
"
href
="
NIL
"
>
<
link
rel
="
stylesheet
"
href
="
/css/style.css
"
>
<
link
rel
="
icon
"
type
="
image/png
"
href
="
/images/sb-desktop-32x32.png
"
>
<
script
src
="
/clipboard.js
"
>
</
script
>
</
head
>
<
body
>
<
button
onclick
="
topFunction()
"
id
="
BackToTopBtn
"
title
="
Go to top
"
>
⯅
</
button
>
<
script
src
="
/backtotop.js
"
>
</
script
>
<
div
class
="
wrapAll clearfix
"
>
<
nav
class
="
navigation
"
>
<
div
class
="
logo
"
>
<
a
href
="
/
"
>
<
img
src
='
/images/sb-logo.png?v=2
'
alt
="
logo
"
>
</
a
>
</
div
>
<
div
class
="
navlinks
"
>
<
a
href
="
/pages/download.html
"
>
Download
</
a
>
<
a
href
="
/pages/news.html
"
>
News
</
a
>
<
a
href
="
/pages/community.html
"
>
Community
</
a
>
<
a
href
="
/pages/articles.html
"
>
Resources
</
a
>
<
a
class
='
active
'
href
="
/pages/reference.html
"
>
Language Reference
</
a
>
<
a
href
="
/pages/guide.html
"
>
SmallBASIC Manual
</
a
>
</
div
>
</
nav
>
<
div
class
="
mainsection
"
>
<
div
class
="
tabs clearfix
"
>
<
div
class
="
tabsRight
"
>
<
a
target
="
_github
"
href
="
https://github.com/smallbasic/smallbasic.github.io/blob/master/_build/reference/1735-system-nil.markdown
"
>
Edit
</
a
>
<
a
target
="
_github
"
href
="
https://github.com/smallbasic/smallbasic.github.io/commits/master/_build/reference/1735-system-nil.markdown
"
>
History
</
a
>
</
div
>
</
div
>
<
div
class
="
article
"
>
<
h1
>
NIL
</
h1
>
<
blockquote
>
a = NIL
</
blockquote
>
<
div
class
="
siteSub
"
>
<
p
>
<
a
href
="
/
"
>
Home
</
a
>
>
<
a
href
="
/pages/reference.html
"
>
Reference
</
a
>
>
<
a
href
="
/pages/system.html
"
>
System
</
a
>
</
p
>
</
div
>
<
p
>
Sets a variable to nil. NIL is used to mean ‘not set’ as distinct
from having a number set to 0.
</
p
>
<
h3
id
="
example-1
"
>
Example 1
</
h3
>
<
div
class
="
sourceCode
"
id
="
cb1
"
>
<
pre
class
="
sourceCode smallbasic
"
>
<
code
class
="
sourceCode smallbasic
"
>
<
span
id
="
cb1-1
"
>
<
a
href
="
#cb1-1
"
aria-hidden
="
true
"
tabindex
="
-1
"
>
</
a
>
b =
<
span
class
="
dt
"
>
NIL
</
span
>
</
span
>
<
span
id
="
cb1-2
"
>
<
a
href
="
#cb1-2
"
aria-hidden
="
true
"
tabindex
="
-1
"
>
</
a
>
<
span
class
="
kw
"
>
print
</
span
>
b
<
span
class
="
co
"
>
' Output: Nil
</
span
>
</
span
>
</
code
>
</
pre
>
</
div
>
<
h3
id
="
example-2
"
>
Example 2
</
h3
>
<
div
class
="
sourceCode
"
id
="
cb2
"
>
<
pre
class
="
sourceCode smallbasic
"
>
<
code
class
="
sourceCode smallbasic
"
>
<
span
id
="
cb2-1
"
>
<
a
href
="
#cb2-1
"
aria-hidden
="
true
"
tabindex
="
-1
"
>
</
a
>
b =
<
span
class
="
dt
"
>
NIL
</
span
>
</
span
>
<
span
id
="
cb2-2
"
>
<
a
href
="
#cb2-2
"
aria-hidden
="
true
"
tabindex
="
-1
"
>
</
a
>
<
span
class
="
kw
"
>
if(
</
span
>
b ==
<
span
class
="
dt
"
>
NIL
</
span
>
)
<
span
class
="
kw
"
>
then pr
</
span
>
int
<
span
class
="
st
"
>
"b is not set"
</
span
>
</
span
>
<
span
id
="
cb2-3
"
>
<
a
href
="
#cb2-3
"
aria-hidden
="
true
"
tabindex
="
-1
"
>
</
a
>
</
span
>
<
span
id
="
cb2-4
"
>
<
a
href
="
#cb2-4
"
aria-hidden
="
true
"
tabindex
="
-1
"
>
</
a
>
<
span
class
="
co
"
>
' Output: b is not set
</
span
>
</
span
>
</
code
>
</
pre
>
</
div
>
<
div
class
="
lavenderBox
"
>
<
div
class
="
header
"
>
Code samples using NIL
</
div
>
<
div
class
="
linklist
"
>
<
a
target
="
_github
"
href
="
https://raw.githubusercontent.com/smallbasic/smallbasic.samples/master/games 3/2048.bas
"
>
2048.bas
</
a
>
</
div
>
</
div
>
<
div
class
="
lavenderBox
"
>
<
div
class
="
header
"
>
System
</
div
>
<
div
class
="
linklist
"
>
<
a
href
="
/reference/1439.html
"
>
CHAIN
</
a
>
<
a
href
="
/reference/1521.html
"
>
COMMAND
</
a
>
<
a
href
="
/reference/1522.html
"
>
CWD
</
a
>
<
a
href
="
/reference/806.html
"
>
DELAY
</
a
>
<
a
href
="
/reference/807.html
"
>
ENV
</
a
>
<
a
href
="
/reference/815.html
"
>
ENV
</
a
>
<
a
href
="
/reference/1443.html
"
>
EXEC
</
a
>
<
a
href
="
/reference/1440.html
"
>
EXPORT
</
a
>
<
a
href
="
/reference/606.html
"
>
FRE
</
a
>
<
a
href
="
/reference/1525.html
"
>
HOME
</
a
>
<
a
href
="
/reference/1441.html
"
>
IMPORT
</
a
>
<
a
href
="
/reference/1462.html
"
>
INCLUDE
</
a
>
<
a
href
="
/reference/1736.html
"
>
MAXINT
</
a
>
<
a
href
="
/reference/1735.html
"
>
<
strong
>
NIL
</
strong
>
</
a
>
<
a
href
="
/reference/1442.html
"
>
OPTION
</
a
>
<
a
href
="
/reference/809.html
"
>
PAUSE
</
a
>
<
a
href
="
/reference/1524.html
"
>
PI
</
a
>
<
a
href
="
/reference/817.html
"
>
PROGLINE
</
a
>
<
a
href
="
/reference/810.html
"
>
RANDOMIZE
</
a
>
<
a
href
="
/reference/818.html
"
>
RUN
</
a
>
<
a
href
="
/reference/1523.html
"
>
SBVER
</
a
>
<
a
href
="
/reference/1734.html
"
>
SELF
</
a
>
<
a
href
="
/reference/812.html
"
>
STKDUMP
</
a
>
<
a
href
="
/reference/813.html
"
>
TROFF
</
a
>
<
a
href
="
/reference/814.html
"
>
TRON
</
a
>
<
a
href
="
/reference/1446.html
"
>
UNIT
</
a
>
</
div
>
</
div
>
</
div
>
<
div
class
="
pagefooter
"
>
This page was last edited on Thu, 8 Jun 2023 12:39:14 +0200
|
<
a
href
="
https://en.wikipedia.org/wiki/Markdown
"
target
="
_blank
"
rel
="
nofollow
"
>
Markdown
</
a
>
processed with
<
a
href
="
https://pandoc.org/MANUAL.html#pandocs-markdown
"
target
="
_blank
"
rel
="
nofollow
"
>
pandoc 3.1.12.1
</
a
>
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div
>
</
div
>
</
div
>
</
body
>
</
html
>
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